In secondhand vape, scientists smell risk Health cherokeephoenix.org Secondhand smoke and secondhand aerosol Many people assume vaping is harmless to bystanders, but secondhand aerosol can contain ultrafine particles and chemical residues. Researchers are examining how exposure may affect airways and overall health, especially for children Don't Be Fooled, E cig Aerosol Is Not Harmless for Kids American Lung Association